biologists say the whaelgs seen friday were moving more slowly with less energy. the big worry for rescuers now, that the whales may be too sick or exhausted to return to the open seas that are their home. for "cbs this morning saturday," anna werner everglades national park. >> i hate seeing those whales up on the beach, so sad. >> she mentioned they're sick they're tired, they could be dehydrated. it makes it even harder to get to water. >>> half the nation is battling an arctic blast that's making roads icy and keeping planes grounded. we'll have the latest, you're watching "cbs this morning saturday." ♪ ♪ ♪ by the end of december we'll be delivering ♪ ♪ through 12 blizzards blowing ♪ ♪ 8 front yards blinding ♪ ♪ 6 snowballs flying ♪ ♪ 5 packages addressed by toddlers ♪ ♪ that's a q ♪ ♪ 4 lightning bolts ♪ ♪ 3 creepy gnomes ♪ ♪ 2 angry geese ♪ ♪ and a giant blow-up snowman ♪ ♪ that kind of freaks me out ♪ [ beep ] [ female announcer ] no one delivers the holidays like the u.s. postal service. priority mail flat ra